engleski

Waste Acceptance Criteria for Disposal

Waste acceptance criteria (WAC) for disposal are a set of qualitative and quantitative requirements imposed by an authority or repository operator that defines properties of disposal packages that shall be fulfilled in order to meet safety of the repository. These criteria cover a very wide range of different radioactive waste properties, from radiological chemical and physical up to mechanical, thermal and biological. Some of them applied to the waste form, some to the metal containers in which the waste form is placed, and some to the resulting package designed for disposal. The national radioactive waste management agency in Slovenia (ARAO) is under course of site confirmation and designing the short-lived radioactive waste disposal facility. Therefore, development of WAC for disposal started recently. The project scope includes review and analysis a number of references focusing in particular on those waste properties and limitations for related parameters that may affect safety of the repository. The paper summarizes an extensive research that has been funded by the ARAO and reported in Preliminary Waste Acceptance Criteria for Disposal, Enconet, 2008. The basis for setting up the preliminary WAC for disposal was the list of waste properties stipulated by Regulation JV7. For each of them qualitative and quantitative requirements are proposed. The proposals are derived from the practice implemented in some European storage facilities and repositories and, on the basis of waste characterization and established WAC for storage in Krško NPP and Brinje facilities. Since the radioactive waste disposal project in Slovenia is in an early stage the related uncertainties are pretty high. This is way WAC for disposal could only be anticipated at the moment. In particular it applies to the quantitative limitations for some parameters. Because of that their limit values were selected using a conservative approach. Optimization of these values is proposed to be carried out in a later stage. However, the preliminary WAC given envisages additional predisposal treatment for some types of waste packages stored in Krško NPP and Brinje facilities.

waste acceptance criteria, disposal, waste characterization

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